He stared at the skull, at the dark spaces where the eyes had once been.  And he wondered, where does the mind go when we die?  Flesh and bones dissolve back into where they originated, but what is the mind of?  Where does it originate?  Where does it return to?  He wondered if this person’s spirit still lived in this cave.  And just then he suspected something, or something rang a bell, but he had no idea what it was.